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- /**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
- #ifdef TARGET_LPC1768
-
- #include "../../inc/MarlinConfig.h"
-
- #if ENABLED(USE_WATCHDOG)
-
- #include <lpc17xx_wdt.h>
- #include "watchdog.h"
-
- void watchdog_init() {
- #if ENABLED(WATCHDOG_RESET_MANUAL)
- // We enable the watchdog timer, but only for the interrupt.
-
- // Configure WDT to only trigger an interrupt
- // Disable WDT interrupt (just in case, to avoid triggering it!)
- NVIC_DisableIRQ(WDT_IRQn);
-
- // We NEED memory barriers to ensure Interrupts are actually disabled!
- // ( https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the )
- __DSB();
- __ISB();
-
- // Configure WDT to only trigger an interrupt
- // Initialize WDT with the given parameters
- WDT_Init(WDT_CLKSRC_IRC, WDT_MODE_INT_ONLY);
-
- // Configure and enable WDT interrupt.
- NVIC_ClearPendingIRQ(WDT_IRQn);
- NVIC_SetPriority(WDT_IRQn, 0); // Use highest priority, so we detect all kinds of lockups
- NVIC_EnableIRQ(WDT_IRQn);
- #else
- WDT_Init(WDT_CLKSRC_IRC, WDT_MODE_RESET);
- #endif
- WDT_Start(WDT_TIMEOUT);
- }
-
- void HAL_watchdog_refresh() {
- WDT_Feed();
- #if DISABLED(PINS_DEBUGGING) && PIN_EXISTS(LED)
- TOGGLE(LED_PIN); // heartbeat indicator
- #endif
- }
-
- // Timeout state
- bool watchdog_timed_out() { return TEST(WDT_ReadTimeOutFlag(), 0); }
- void watchdog_clear_timeout_flag() { WDT_ClrTimeOutFlag(); }
-
- #endif // USE_WATCHDOG
- #endif // TARGET_LPC1768
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